Edwaed weston



(No Model.)

B. WESTON.

DYNAMO ELECTRIC MACHINE.

No. 259,618. Patented Junel3, 1882.

UNITED STATES PATENT OFFICE.

EDWARD WESTON, F NEWABK, NEW JERSEY, ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF NEW YORK, N. Y.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 259,618, dated June 13, 1882.

Application filed December 13, 1881.

To all whom it may concern Be it known that I, EDWARD WEs'roN, a subject of the Queen of Great Britain, and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Dynamo- Electric Machines, of which the following is a specification, reference being had to the drawings accompanying and forming a part of the same.

In a former patent granted to me, No. 209,532, I have shown and described a dynamo-electric machine the armature of which is successively wound with two systems of i 5 coils, one overlying the other, each system being wound in diametrically-separate divisions, and each division or coil being connected to the next adjoining division by a loop, from which connection is made to one of the commutator-strips.

In another and subsequent patent also granted to me, No. 211,311, I have illustrated an improvement upon the original method of constructing the armature, which resembles the original with respect to the general principle of winding and connecting to the armature, but is distinguished by having each system of coils wound upon itself, so that the systems shall be alongside each other in the divisions of the armature and equidistant from the center of the same. By this means the two coils of each division of the armatureare of equal length, and consequently oppose severally the same degree of resistance to the passage of the induced currents.

The present. invention is designed as a still further improvement upon the above-described systems ofjwinding, as by the methods of construction which it involves both time and labor are saved and a more serviceable armature produced.

The invention consists mainly in alternately superposing the several divisions of the two systems of coils, so that the distinguishing 4 5 characteristics of both the above systems are in a measure combined.

The drawings hereto annexed illustrate a practical embodiment of the invention as stated.

Figure 1 is an end view of an armature 5o wound in accordance with the present sys- (No model.)

tem, the commutator and connections being illustrated. Fig. 2 is a section at right angles to the axis of the armature-cylinder, illustrating the disposition of the coils.

For an understanding of the construction of the armature-cylinder, the principles involved in the winding and connection of the conductors constituting the armature-coils, and general character of the machine with which it is or may be employed, reference is made to my former patents-to wit, Nos. 209,532 and 211,311.

The following is a description of the method of winding here employed: In any two diametrically-opposite recesses of the armature-as A A-an insulated wire of the desired size is wound until one-fourth of the said recesses 1's filled by a coil, or a. The two ends are brought out and temporarily secured. The armature is then turned half-way round and the coil 1) 7o wound upon the first. hen the same number of layers is reached a loop, I), is formed in the usual way, and the winding continued alongside of coil a until coil 0 is formed. The wire is then cut off, forming a free end, which is temporarily secured. The armature is again turned half back and coils d e wound in precisely similar manner, and this plan is followed until all the recesses of the armature are filled, each with four divisions or sections of the two systems of coils, said sections being alternately superposed in regular order around the armature. The free ends left after completing the winding are joined, as shown in Fig. 2, thus forming a practically-continuous conductor, and from the loops formed in this manner and those originally existing connection is made to the commutator-segments in the usual manner. By this arrangement the two systems of coils are very nearly of equal length and equal re- 0 sistance, and their mean distances from the center of revolution the same.

I prefer usually to wind the two systems, which are represented respectively by the dark and light lines, so that each recess will contain 5 four divisions of coil. I may, however, vary this number. For instance, each recess may contain only two or more than four, the same results being attained.

I would also state that I do not confine mytoe self to the method herein proposed for winding the coils, as other plans may be followed for reaching the same relative distribution of the several divisions.

The size and character of the conductors employed and the uses for which the machine is intended will of course determine the number of layers in each coil or section of coil.

Having therefore described my invention,

10 what I claim as new, and desire to secure by Letters Patent, is-

1. An armature wound with two systems of coils in diametricallyseparate divisions, the divisions of one system being alternately un- 15 der and over those of the other, and the said divisions being looped together and connected to the commutator, substantially in the manner described.

2. An armature for dynamo-electric 111achines, containing recesses or grooves wound with two systems of coils in diametrically-separate divisions, each recess containing four of such divisions, the divisions of one system being alternately under and over the divisions in the other, and all being looped together and connected to commutator-segments, substantially as shown and described.

EDWARD WESTON.

WVitnesses I PARKER W. PAGE, W. FRISBY. 

